I read afterwards that to make a haikai you should write: 5,7,5 + 7,7 + 5,7,5 + 7,7....

My third and fourth haiku should go together, because of "ona".

It's a little easier to split the four into two. They are connected with the concept of time and matter, though.As a matter of fact, it's not crucial whether it "doesn't want to count time" or "counts a no-time". The second one is more abstract but even more interesting as hiding in timelessness.

Yes, haiku are a condensation of an older. more elaborate form. However, they have worked well independently for going on thjree centuries, so I don't think we need to worry about the older conventions. Chain haiku are common from the start and persist, so, these four can be viewed as four or as two pairs or as on long chain (but we need a note about that, since the isolated form is the more familiar). It does help with the last, though.